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United States Patent 282

Issue date: July 17, 1837


To all whom it may concern:

Be it known that I, Eensselaer D. Granger, of the city of Troy, 
in the county of Rensselaer and State of New York, have invented 
an improvement in what are usually denominated "rotary stoves," 
by the addition of an oven thereto, which does not interfere with 
the other ovens or means of cooking, or require any additional 
fuel for heating it, and which oven may be added to stoves of 
other descriptions; and I do hereby declare that the following is 
a full and exact description thereof.

The drawing represents the ordinary rotary stove with my 
improvement thereon.

The top or revolving plate, A, has a tube or collar passing 
through a hole in its center to receive the pipe B, which tube or 
collar is firmly attached to the lower plate, but is open on one 
or more sides within the chamber, between the two plates, to 
admit the heated air to pass into it and into the pipe B, which 
fits onto it. The top A revolves freely round the tube or collar. 
A second pipe, C, rises from the diving-flue at the back of the 
stove in the ordinary way. and both these pipes enter the bottom 
plate of an oven, B, which I usually make of sheet-iron. This 
oven is composed of double plates at its top, bottom, and ends, 
forming tines which surround it, excepting at the sides, where 
the doors are situated. When this oven is to be used for baking, 
a valve, E, in the pipe B is left open. The principal part of the 
heated air from the fire will then pass up this pipe and through 
the flues above and below the oven, escaping eventually through a 
pipe from F into a chimney. Sometimes I put a valve into the pipe 
C and dampers or valves into the flues above and below the oven; 
but in general I omit these, having found the valve in the pipe B 
sufficient, and therefore to be preferred on account of its 
simplicity. The oven D is elevated by means of the pipes B and C 
to such a height as to allow the boilers to pass under it, and as 
the tube or collar leading to the pipe B might otherwise 
interfere with the use of a boiler of large size without 
increasing the diameter of the top, I make a swell, G, in the 
periphery of the rotary top to admit such a boiler.

Having thus fully described my said improvement and shown what I 
believe to be the most convenient mode of carrying the same into 
operation, I wish it to be understood that I do not intend to 
confine myself to the precise manner of constructing the same 
herein presented. There may, for example, be two diving-flues, 
each furnished with a pipe like, that marked C, and leading into 
the flue of an oven constructed like D, by which a like end would 
be attained, but in a manner less convenient than that above 

What I claim as my improvement isó

1. The conveying the heated air from the fuel through two or more 
pipes into an oven elevated above the main body of a rotary 
stove, allowing the boilers to pass under it, and operating 
substantially upon the principle herein set forth.

2. The formation of the swell or curve extending beyond the 
periphery of the rotary top, for the purpose of giving room to a 
large boiler, either when a center tube or collar is employed or 
when it is desired to obtain room in the ordinary rotary stove in 
which my oven is not used.